Firmware updater improvements

[danngreen]

Various improvements to UX of firmware updating, some from #204

• Faster update of QSPI flash: only erase/write changed sectors. This makes the checksum of whole image redundant, so we skip that
• Show name/description of file being processed
• Show overall progress (file id and total number of files or log of previous actions like a terminal)
• Show release version in gui before actual update processes starts
• Allow skipping wifi update files if failed to connect (notify/confirm with user). Not an error, message at the bottom of screen displays what was skipped

[LnnrtS]

Rebased onto main to include #287

[danngreen]

Rebased on main again, adding the fix for SDMMC timeout (#299 (comment))

[danngreen]

I merged in "Faster update of QSPI flash: only erase/write changed sectors. This makes the checksum of whole image redundant, so we skip that"